Cab-brake



J. H. DUFF.

CAR BRAKE.

M'Pucmmn HLED SEPI. 2?. |920.

Patented July 12, 1921.

UNITED STATES PATENT orricu.

:roms n. nerr, on nurses crrY, MISSOURI.

CAIR-BRAKE.

Applioation illed September 2?, 1920. Serial No. 412,955.

To all whom 'it 'may concern:

Be it known that I, J oms H. DUrF a citizen of the United States, residing at enses City, in the county of Jackson and State of Missouri, have invented e new and Car-Brake, of which thefollowing is n specification.

My invention relates to car brakes, und the objects of the invention are first, to provide a chen durable und eiiicient car brake for railroad cars and street railway cars which may be operated safely by one hand,

second, to provide the brake with facilities for making quick broke iiplicutions sind releases and third, to provi e automatic means whereby the brake may be operated with safety to the brakemiin.

I attain these objects and other advantu ges by the mechanism illustrated in the accompanying drawing in which-Fi ure 1, is u iront view of a cur brake embo ying my invention and showing the same mounted ou the end of :i railway cai'. Fig. 2, is an end View of the same. Fig. 3,is a horizontal section of the seme, on the line 3 3, in Fig. 2; und Fig. 4, is a side view of the lower portion of the lever, end showing the sc me rotatable on the mobile body, the letter being shown in section.

Similar reference numerals refer to corresponding parts throughout the several views.

The numeral 1, designates the end portion of n railway cor, 2, the couplling thereof, 3, the broke rod connected wit the customary broke rigging, not shown, 4 the usual plet- '10. A drum 11, is secu i'oi'm for the convenience o' brukemen, und the usual rah iron 5.

The cor rake consists of a frame 6, heving vertical end flanges 7, in which a. shaft 8, is journaled. An annular flange 9, 1s urrimged trensverseiy of the frame and is p rovided with a concentrici? formed openinv on the inner en portion of the shaft 8, and ratchet teeth 12, ere formed on the inner end thereof. A mobile concentricully formed body member 13. is mounted idly on the shaft 8, and provided with s aced annular channels 14, and with ratchet th 15, on its inner end, which teeth are ade ted for enga 'ng the ratchet teeth on the ruin, the rat et teeth on .the ends of the drum and mobile body being radially extending. Ratchet teeth ere forme on the periphery of the section of the body member 13, located between the channels 14e,

thereby forming a. ratchet wheel section 16. A tension spring 17 is coiled about the shaft 8, und is irren to normally press the body 1 3, inward, so that the teeth 15, thereon shall normally engage the teeth 12, on the drum. A hand lever 18, is provided for Working the brake and it isprovided on its lower end lportion with split ring sections 19 und 20, w ich rings are adapted for entering the channels 14, and being clamped to Esther by bolts 21, and their nuts, the latter olts piercing lugs 22, on the lower sections of the rings. Extensions 23, are formed on the rings und are arranged to be attached on the sides of the lower portion of the lever proper b bolts 24. The ringsections, when assemble( with the lever, are arranged to turn on the body member 13, et the bottom ot the channels 14. A pushing awl 25, is pivotally mounted on the lever lJS, by bolt 26, mounted in ears 27. A tension spring 2S, is mounted on the lever 18, and the free end thereof is disposed under the upper end of the pawl 25, to hold the puwl engaged yvith the ratchet wheel section 16. A detainmg psi-wl or dog 29, is pivotslly mounted on the buse of the frame and it is arranged to hoi-molly en age'the ratchet wheel section 16, and detain the same and prevent back-y ward rotation of the bod member 13. A concentricelly curved we ge shaped meniber 30, is mounted on the Hangs 9, at the border thereof and in the field of the buck stroke of the lever 18, so that when a full buck stroke of the lever is made, the lutter will slidubly engage the wedge and, thereby, force the body member 13, back against the tension of the spring 17, and disenguge the ratchet teeth l2 sind 15, thus ermitting the drum to rotate backward. .E ohnin 31, is partially wound on the drum 11, and, therefrom, passed through opening 32, in the buse of the frame, over s. roller or pulley 33, ou the sill of the car, to c connection with the broke rod 3.

The cor brake above described is a safety appliance intended t-o prevent injuries to brakemen when making brake applications. The provision of n hand lever permits the brakeinan to hold on the usual ab iron by one hand and to apply the bra e with the other hand and, at the same time, to view the environments and observe the necessity for einer ency or other applications of the broke. e teeth or cogs on the drum and on the ciid of the body member 13, :ire held normally engaged with euch other by the pressure of the spring 17. To op ly the brake the lever 18, is pushed o1 p1 ed forward repeatedly und the pushing paul ro tetes forwardly the entire assembly of arts and the deteining pewl serves to hol the same, in the well known manner of ratchet wheels. The forward rotation of the drum l1, winds thech'arin 3l, thereon thus the brake riggingis drawn to set the brake. To relense ehe brake, the lever 18, is moved back n, full' stroke .in thismovement, the lever encounters the Wedge 30,.:1ndslding `thereon, forces the body member 13, apart from the drum 11, whereupon the chum is permit-ted to unwind' as the bra-ke rigging renets, Tihen the lever is returned forwardly', und is clear of 'Contact with the Wedge 30, the springl 1T, renctsand presses the body member 1m |`:x1-(H3Y to un engagement with the drum 1l.

Having described my. invention what I claim is- In n cer brake, the combination with a ca r having brake rigging, of e frame mounted on the cur, u slmrl't journuled in said frame,

ezeezsat :1 drum secured on seid shaft and lluving rndiully extending ratchet teeth on its inner end n mobile member mounted idly on said shaft und having rndielly extending ratchet teeth on its inner end and adopted for engngu'ng :md dsengnging the ratchet teeth Von seid drum und provided with u, ratchet wheel section, e coiled' sprinnr looseljr mounted on said shaft und norm: ily pressing said mobile member toy engagement with said drum, u lever rotatably mounted on said mobile member, :1 spring uctuuled pushing paul mounted on seid lever und engaging the ratchet Wheel on Suid mobile member, :i paul nornml-lv detainng said mobile member from lmcliu'ard rotation, :md u concentrienll; curved wedge shaped member on sn'd flume und in the .field ol the bue-l: stroke o'F snid lever und adapted i'or foi-rim;r the mobile member apart from the drum.

Dnted Kansas City, Jackson county, Missouri, September 22d, 1920.

JOHN Il. DUFI". 1Witnesses:

S. B. CRANE, BA'rrLJ-J MCCMQDLE. 

